linux-kernel - Re: [peterz-queue:perf/core 5/6] arch/s390/kernel/perf_pai_ext.c:533:25: error: initialization of 'void (*)(struct perf_event_pmu_context *, bool)' {aka 'void (*)(struct perf_event_pmu_context *, _Bool)'} from incompatible pointer type 'void (*)(struct perf_event

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Message-ID: <Y0gcLRmJ4n5hUZW6@hirez.programming.kicks-ass.net>
Date:   Thu, 13 Oct 2022 16:09:49 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: [peterz-queue:perf/core 5/6]
 arch/s390/kernel/perf_pai_ext.c:533:25: error: initialization of 'void
 (*)(struct perf_event_pmu_context *, bool)' {aka 'void (*)(struct
 perf_event_pmu_context *, _Bool)'} from incompatible pointer type 'void
 (*)(struct perf_event_context *, bool)' {aka '...

On Thu, Oct 13, 2022 at 09:49:06PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core
> head:   a7560340a5a83514ad5117aec2c770956e1813f3
> commit: aab8cdf010eb30b0214da37cb770b4f965637a97 [5/6] perf: Rewrite core context handling
> config: s390-allmodconfig
> compiler: s390-linux-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=aab8cdf010eb30b0214da37cb770b4f965637a97
>         git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
>         git fetch --no-tags peterz-queue perf/core
>         git checkout aab8cdf010eb30b0214da37cb770b4f965637a97
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash arch/s390/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
> >> arch/s390/kernel/perf_pai_ext.c:533:25: error: initialization of 'void (*)(struct perf_event_pmu_context *, bool)' {aka 'void (*)(struct perf_event_pmu_context *, _Bool)'} from incompatible pointer type 'void (*)(struct perf_event_context *, bool)' {aka 'void (*)(struct perf_event_context *, _Bool)'} [-Werror=incompatible-pointer-types]
>      533 |         .sched_task   = paiext_sched_task,
>          |                         ^~~~~~~~~~~~~~~~~

Simple matter of changing the function signature seems to cure things.
I'll shortly push a new version.